| 摘要 |
PURPOSE:To prevent the crosstalk of a transmission permitting signal by using a communication channel for a transmission permitting signal sent by a master station different from a communication channel used for transmission of a transmission requiring signal by a station. CONSTITUTION:The coincidence confirming means 6 of a master station receiving an ID code at a reception means 2 compares the ID code with an ID code stored in an ID code storage means 5, informs the coincidence to a control circuit 7 when the coincidence is confirmed and the control circuit 7 sends the ID code received by a transmitting means 3 again. The slave station receiving the information at a reception means 12 terminates the procedure of transmission and a transmitting means 13 sends a transmission data 16 being a substantial object. The master station handles the reception data received thereafter as the reception data being the substantial object. Thus, even when a transmission requirement is issued simultaneously by plural stations and crosstalk and takes place, the transmission permitting signal is not in crosstalk and the transmission/reception procedure is ensured. |
